lab4/histogram.cpp

#include "histogram.h"

bool find_minmax(const std::vector<double>& numbers, double& min, double& max) {
    if (numbers.size() == 0){
        return true;
    }
    else{
    min = numbers[0];
    max = numbers[0];
    for (double x : numbers) {
    if (x < min) {
        min = x;
    }
    else if (x > max) {
        max = x;
    }
}
return false;
}
}

std::vector<size_t> make_histogram(const std::vector<double>& numbers, size_t bin_count){
    double max,min;
    std::vector<size_t> bins(bin_count);
    find_minmax(numbers,min,max);
    double bin_size = (max - min) / bin_count;
        for(double x:numbers)
     {
        bool found = false;
    for (size_t j = 0; (j < bin_count - 1) && !found; j++) {
        auto lo = min + j * bin_size;
        auto hi = min + (j + 1) * bin_size;
        if ((lo <= x) && (x < hi)) {
            bins[j]++;
            found = true;
        }
    }
    if (!found)
        bins[bin_count-1]++;
    }
    return bins;
}